CAT3606 Datasheet, PDF (6/11 Pages) Catalyst Semiconductor – 6-Channel Low Noise Charge Pump White LED Driver

CAT3606
TYPICAL CHARACTERISTICS
VIN = 3.6V, EN = VIN, ENM = ENS = GND, C_IN = C_OUT = 1µF, R_SET = 24kΩ (20mA per LED), T_AMB = 25˚C, unless
otherwise specified.
Efficiency vs. Input Voltage (6 LEDs)
100
90 1x mode
80
70
1.5x mode
60
50 _{20mA per LED}
40
15mA per LED
4.2 4.0 3.8 3.6 3.4 3.2 3.0
INPUT VOLTAGE [V]
Efficiency vs. Total LED Current (6 LEDs)
100
90
VIN = 4V (1x mode)
80
70
60
50
VIN = 3.2V (1.5x mode)
40
0
50
100 150 200
TOTAL LED CURRENT [mA]
LED Current Change vs. Input Voltage
1.5
1.0
6 LEDs at 15mA
0.5
0.0
-0.5
-1.0
-1.5
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
LED Current Change vs. Temperature
4
3
2
1
0
-1
-2
-3
-4
-50 -25
6 LEDs at 15mA
Vin = 4V
0 25 50 75 100 125
TEMPERATURE [°C]
Ground Current vs. Input Voltage (1x mode)
0.5
Ground Current vs. Temperature (1x mode)
0.5
0.4
0.4
0.3
0.3
0.2
6 LEDs OFF
0.1
0.0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
0.2
0.1
6 LEDs OFF
Rset = 500kΩ
0.0
-40 -20
0 20 40 60 80 100
TEMPERATURE [°C]
Doc. No. 5009, Rev. B
© 2005 by Catalyst Semiconductor, Inc.
6
Characteristics subject to change without notice